31503120342011 has 16 divisors (see below), whose sum is σ = 34177440422400. Its totient is φ = 28942077778848.

The previous prime is 31503120341977. The next prime is 31503120342019. The reversal of 31503120342011 is 11024302130513.

It is a cyclic number.

It is not a de Polignac number, because 31503120342011 - 2¹⁴ = 31503120325627 is a prime.

It is a super-2 number, since 2×31503120342011² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31503120342019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161727665 + ... + 161922338.

It is an arithmetic number, because the mean of its divisors is an integer number (2136090026400).

Almost surely, 2^{31503120342011} is an apocalyptic number.

31503120342011 is a deficient number, since it is larger than the sum of its proper divisors (2674320080389).

31503120342011 is a wasteful number, since it uses less digits than its factorization.

31503120342011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323650178.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 31503120342011 its reverse (11024302130513), we get a palindrome (42527422472524).

The spelling of 31503120342011 in words is "thirty-one trillion, five hundred three billion, one hundred twenty million, three hundred forty-two thousand, eleven".